Collective interactions in a quantum well: The inclusion of nonlocal exchange
- 15 May 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 43 (15), 12406-12412
- https://doi.org/10.1103/physrevb.43.12406
Abstract
We present a variational scheme for calculating the irreducible polarizability of an electron system and apply this method to the exchange interaction in a single quantum well. The collective spin-density and intersubband plasmon energies are derived and evaluated numerically in an infinite-square-well approximation. These results are compared with experiments as well as with the previous theoretical results based upon the local-density approximation.Keywords
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